Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/2326
標題: 熱變位補償系統技術運用於動柱式銑床
The thermal compensation system for moving column machining center
作者: 王士杰
Wang, Shih-Chieh
關鍵字: moving column machining center;動柱式銑床;Thermal deformation;溫升熱變形
出版社: 機械工程學系所
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摘要: 
本研究在於工具機熱補償技術中,快速建立熱誤差模型,增進加工精度達補償目的。在過去的研究中熱誤差模組的建立,是根據定柱式機台的性質而建立,但因機台性質與結構不同,而溫度擷取的位置也因機型而異,本研究針對動柱式銑床建立符合該機台特性的熱誤差補償系統,因該機台的箱型體設計,其重現性較佳、加工變形量較小,採取輕量化設計,故也有剛性不佳的缺點。
本文針對動柱式銑床建立一套熱誤差補償系統,首先針對動柱式銑床的熱特性做分析,利用溫度IC感測器(Smart Sensor)量測熱原之溫度變化,配合觸發式探頭(TS27R)進行實際切削中熱變位之量測,收集足夠的溫度與熱變位的資料後,以迴歸分析建立熱補償模組,判定關鍵溫度點,有著快速、簡單的優點,並且有著相當程度的準確性,但尚有改善的空間,再者導入類神經網路方法中,增進熱誤差補償模型的精準度,亦效果更佳。藉由觀察關鍵溫度點,機台與溫度點可能存在著某種關聯性,本實驗則因機台構型的差異所得到的關鍵溫度點而有所不同,透過機台特性分析,即可得熱變形趨勢,透過實驗即可證明動柱式中鞍座對於立柱的偏擺存在著相當大的關連性,最終刀具基準端產生偏移,形成熱誤差。最後建立一套熱誤差補償量測技術,並實際應用於工具機,藉此改善機台熱誤差。

This paper purposed a rapid thermal compensation method to predict thermal error which induced in machine tool, using this method to improve its accuracy. In the past, compensation model is based on the fixed column machine center, due to the structure differently, the selection of the sensor location is different between moving column machine center. Our research is focused on the column machine center, because the box structure design has many advantages such as better repeatability, smaller deformation, and lightweight design, but the short point is poor rigidity.
This research builds a thermal compensation system of the moving column machine center. We use IC temperature sensors and trigger probe (TS27R) to get the thermal characters of this machine, when get sufficient temperature and deformation data, using multiple regression method to establish a thermal predict model, advantages of this approach over other approach is the fast and simple, and has good accuracy. Next, use neural network methods to improve accuracy and better results.
Practice experiments show moving center in the saddle for the deflection of the column there are considerable relevance. Finally, to establish a thermal compensation system have been applied in the moving column center, to improve its thermal error.
URI: http://hdl.handle.net/11455/2326
其他識別: U0005-2107200909591900
Appears in Collections:機械工程學系所

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